[Heath] Gettering 572B's for a Heathkit SB-200

[Wilson Lamb]

I'm very aware that I have a limited view on this and am happy to learn. 
So if there are sites that explain what is going on and can verify that the treatment helps, they would be most helpful and interesting. 
And how do we know a failed tube would have been helped by gettering?? 


WL 
----- Original Message -----

From: "Robert Groh" <rgroh at swbell.net> 
To: "George Collins" <gjcollins at cox.net>, Heath at puck.nether.net 
Sent: Monday, August 10, 2015 11:02:55 AM 
Subject: Re: [Heath] Gettering 572B's for a Heathkit SB-200 



George, there are ton's of hits on the subject if you do a Google web search for '572B tubes gettering'. Basically I think you arrange to turn the filaments on and then run the tubes for couple of days - no drive, just idle current. At any rate, I suggest you plow though the bunch of links found from your web search. 


73 and happy QRO 
Bob Groh, WA2CKY 









On Monday, August 10, 2015 6:01 AM, George Collins <gjcollins at cox.net> wrote: 




Gettering 572B's for a Heathkit SB-200 

Hello Group, 
I have a few 572B’s that having been unused for unknown lengths of time, probably several years. It is possible to getter this tubes be for putting them into service in order to avoid arcing or flash over? Are there any other measures that can be taken with the 572B’s to avoid failures at startup? I plan to use these tubes in an SB-200 amp. The amp is working now, but the tubes are weak. The replacements I have are either New Old Stock or “good” used. 
Thanks and 73, 
George, KC1V 

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